It’s not the kind of thing you want to think about while you’re in child’s pose in yoga class, when your nose is close to the mat, but after hearing how you should stop touching your face to guard against the coronavirus, you might wonder: What are the risks of transmission while working out at a gym?

The spread of the coronavirus could make even the most ardent gym rats stress out about picking up barbells.

There’s a lower risk of picking up the coronavirus at a gym or health club than at a church service, for example, said Dr. David Thomas, a professor of medicine and director of the Division of Infectious Diseases at Johns Hopkins University School of Medicine. By comparison, church services may include shaking hands and being in closer proximity to people.

But if you’re in a community where there have been cases of the coronavirus, “that’s, perhaps, a time to be more cautious with all types of exposures, including a gym,” Dr. Thomas said.

Sweat cannot transmit the virus but high-contact surfaces, such as barbells, can pose a problem, he said.

Scientists are still figuring out how the virus exactly spreads but have provided some guidance on how it seems to be transmitted. A study of other coronaviruses found they remained on metal, glass and plastic for two hours to nine days.

Certain objects, like handles and doorknobs, are “disproportionally affected by hands, and those are the surfaces most likely to have viruses for that reason,” Dr. Thomas said.

The owner of a yoga studio in Washington State, where several coronavirus patients have died, according to The Yoga Journal, “says she’s seen a direct impact from all the hysteria in the area on both attendance and business.”

Equinox, the luxury fitness club brand, has sent notices to members, reassuring them that additional steps are being taken during the peak flu season and amid growing concerns about the coronavirus.

The additional steps include disinfecting all club areas with a hospital-grade solution three times a day, reminding people to stay home if they are sick and asking instructors to eliminate skin-to-skin contact, like hands-on adjustments during yoga, a spokeswoman said.

Brian Cooper, chief executive of YogaWorks, sent an email to the company’s clients, reassuring them that it was stepping up its cleaning processes “to keep our facilities a safe and welcoming environment for all students and staff.”

David Carney, president of Orangetheory Fitness, listed precautions in an email on Thursday. “Wipe down your equipment after every block, and don’t hesitate to request a new wipe whenever you need to,” he wrote.

Do you know what’s in those nondescript spray bottle at gyms that you’re supposed to use to wipe down your machine, mat and equipment?

If you’re not sure, ask staff members what’s in the bottle or take your own wipes to the gym.

“I’ll probably bring my own wipes,” Dr. Thomas said on Saturday of his gym trip planned for later that day. “I’ll know that they’re the right wipes and they have the right concentration of alcohol.”

Diluted household bleach solutions, alcohol solutions with at least 70 percent alcohol and several common household disinfectants should be effective against the coronavirus, according to the Centers for Disease Control and Prevention.

The Environmental Protection Agency released a list of disinfectants against the virus.

In addition to avoiding frequently handled machines and equipment, it’s recommended, as always, that you wash your hands often and don’t touch your face.

And if you’re feeling sick, stay home.

“This is mostly about how you keep from getting sick at a gym, but please don’t go to the gym if you feel sick,” Dr. Thomas said. “Don’t give it to other people.”

Heather Murphy contributed reporting.